where adultservicesusedtobe. criticism mouned when phillip markoff, a so-called craigslist killer used the site to lure his victims. >> craigslist was walmart of sex trafficking. hopefully what craigslist has done will serve as an example to the other less visited web sites. >> reporter: the decision by craigslist comes under public pressure. including that of 17 states attorneys general, demanding the end of adult service listings. >> we have asked craigslist to take action, eliminating prostitution ads and forl now, it has done -- fortunately now, it has done the right thing voluntarily by shutting down the adult services section. >> reporter: congress woman jackie spear has scheduled a congressional hearing for september 15 focusing on craigslist. >> there is no question that craigslist adult questions is aiding and abetting criminal activity. and there is 100 to 300,000 children in this country, many of them run-aways that are sexually trafficked right here. they're not imported. they're right here in our community. >> reporter: spear says craigslist earns more than $35 millio